| Message ID | 20240403080452.1007601-5-atishp@rivosinc.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | RISC-V SBI v2.0 PMU improvements and Perf sampling in KVM guest | expand |
On Wed, Apr 03, 2024 at 01:04:33AM -0700, Atish Patra wrote: > It is a good practice to use BIT() instead of (1UL << x). (1UL << x) isn't generally a problem. The problem is with (1 << x). > Replace the current usages with BIT(). > > Signed-off-by: Atish Patra <atishp@rivosinc.com> > --- > arch/riscv/include/asm/sbi.h | 20 ++++++++++---------- > drivers/perf/riscv_pmu_sbi.c | 2 +- > 2 files changed, 11 insertions(+), 11 deletions(-) > > diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h > index ef8311dafb91..4afa2cd01bae 100644 > --- a/arch/riscv/include/asm/sbi.h > +++ b/arch/riscv/include/asm/sbi.h > @@ -233,20 +233,20 @@ enum sbi_pmu_ctr_type { > #define SBI_PMU_EVENT_IDX_INVALID 0xFFFFFFFF > > /* Flags defined for config matching function */ > -#define SBI_PMU_CFG_FLAG_SKIP_MATCH (1 << 0) > -#define SBI_PMU_CFG_FLAG_CLEAR_VALUE (1 << 1) > -#define SBI_PMU_CFG_FLAG_AUTO_START (1 << 2) > -#define SBI_PMU_CFG_FLAG_SET_VUINH (1 << 3) > -#define SBI_PMU_CFG_FLAG_SET_VSINH (1 << 4) > -#define SBI_PMU_CFG_FLAG_SET_UINH (1 << 5) > -#define SBI_PMU_CFG_FLAG_SET_SINH (1 << 6) > -#define SBI_PMU_CFG_FLAG_SET_MINH (1 << 7) > +#define SBI_PMU_CFG_FLAG_SKIP_MATCH BIT(0) > +#define SBI_PMU_CFG_FLAG_CLEAR_VALUE BIT(1) > +#define SBI_PMU_CFG_FLAG_AUTO_START BIT(2) > +#define SBI_PMU_CFG_FLAG_SET_VUINH BIT(3) > +#define SBI_PMU_CFG_FLAG_SET_VSINH BIT(4) > +#define SBI_PMU_CFG_FLAG_SET_UINH BIT(5) > +#define SBI_PMU_CFG_FLAG_SET_SINH BIT(6) > +#define SBI_PMU_CFG_FLAG_SET_MINH BIT(7) > > /* Flags defined for counter start function */ > -#define SBI_PMU_START_FLAG_SET_INIT_VALUE (1 << 0) > +#define SBI_PMU_START_FLAG_SET_INIT_VALUE BIT(0) > > /* Flags defined for counter stop function */ > -#define SBI_PMU_STOP_FLAG_RESET (1 << 0) > +#define SBI_PMU_STOP_FLAG_RESET BIT(0) > > enum sbi_ext_dbcn_fid { > SBI_EXT_DBCN_CONSOLE_WRITE = 0, > diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c > index babf1b9a4dbe..a83ae82301e3 100644 > --- a/drivers/perf/riscv_pmu_sbi.c > +++ b/drivers/perf/riscv_pmu_sbi.c > @@ -386,7 +386,7 @@ static int pmu_sbi_ctr_get_idx(struct perf_event *event) > cmask = 1; > } else if (event->attr.config == PERF_COUNT_HW_INSTRUCTIONS) { > cflags |= SBI_PMU_CFG_FLAG_SKIP_MATCH; > - cmask = 1UL << (CSR_INSTRET - CSR_CYCLE); > + cmask = BIT(CSR_INSTRET - CSR_CYCLE); > } > } > > -- > 2.34.1 > Other than the commit message, Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Thanks, drew
On 4/4/24 04:08, Andrew Jones wrote: > On Wed, Apr 03, 2024 at 01:04:33AM -0700, Atish Patra wrote: >> It is a good practice to use BIT() instead of (1UL << x). > > (1UL << x) isn't generally a problem. The problem is with (1 << x). > Yes. That's why, the commit message said it's good to have :) I improved the commit message to specify about 1 << x as well. >> Replace the current usages with BIT(). >> >> Signed-off-by: Atish Patra <atishp@rivosinc.com> >> --- >> arch/riscv/include/asm/sbi.h | 20 ++++++++++---------- >> drivers/perf/riscv_pmu_sbi.c | 2 +- >> 2 files changed, 11 insertions(+), 11 deletions(-) >> >> diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h >> index ef8311dafb91..4afa2cd01bae 100644 >> --- a/arch/riscv/include/asm/sbi.h >> +++ b/arch/riscv/include/asm/sbi.h >> @@ -233,20 +233,20 @@ enum sbi_pmu_ctr_type { >> #define SBI_PMU_EVENT_IDX_INVALID 0xFFFFFFFF >> >> /* Flags defined for config matching function */ >> -#define SBI_PMU_CFG_FLAG_SKIP_MATCH (1 << 0) >> -#define SBI_PMU_CFG_FLAG_CLEAR_VALUE (1 << 1) >> -#define SBI_PMU_CFG_FLAG_AUTO_START (1 << 2) >> -#define SBI_PMU_CFG_FLAG_SET_VUINH (1 << 3) >> -#define SBI_PMU_CFG_FLAG_SET_VSINH (1 << 4) >> -#define SBI_PMU_CFG_FLAG_SET_UINH (1 << 5) >> -#define SBI_PMU_CFG_FLAG_SET_SINH (1 << 6) >> -#define SBI_PMU_CFG_FLAG_SET_MINH (1 << 7) >> +#define SBI_PMU_CFG_FLAG_SKIP_MATCH BIT(0) >> +#define SBI_PMU_CFG_FLAG_CLEAR_VALUE BIT(1) >> +#define SBI_PMU_CFG_FLAG_AUTO_START BIT(2) >> +#define SBI_PMU_CFG_FLAG_SET_VUINH BIT(3) >> +#define SBI_PMU_CFG_FLAG_SET_VSINH BIT(4) >> +#define SBI_PMU_CFG_FLAG_SET_UINH BIT(5) >> +#define SBI_PMU_CFG_FLAG_SET_SINH BIT(6) >> +#define SBI_PMU_CFG_FLAG_SET_MINH BIT(7) >> >> /* Flags defined for counter start function */ >> -#define SBI_PMU_START_FLAG_SET_INIT_VALUE (1 << 0) >> +#define SBI_PMU_START_FLAG_SET_INIT_VALUE BIT(0) >> >> /* Flags defined for counter stop function */ >> -#define SBI_PMU_STOP_FLAG_RESET (1 << 0) >> +#define SBI_PMU_STOP_FLAG_RESET BIT(0) >> >> enum sbi_ext_dbcn_fid { >> SBI_EXT_DBCN_CONSOLE_WRITE = 0, >> diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c >> index babf1b9a4dbe..a83ae82301e3 100644 >> --- a/drivers/perf/riscv_pmu_sbi.c >> +++ b/drivers/perf/riscv_pmu_sbi.c >> @@ -386,7 +386,7 @@ static int pmu_sbi_ctr_get_idx(struct perf_event *event) >> cmask = 1; >> } else if (event->attr.config == PERF_COUNT_HW_INSTRUCTIONS) { >> cflags |= SBI_PMU_CFG_FLAG_SKIP_MATCH; >> - cmask = 1UL << (CSR_INSTRET - CSR_CYCLE); >> + cmask = BIT(CSR_INSTRET - CSR_CYCLE); >> } >> } >> >> -- >> 2.34.1 >> > > Other than the commit message, > > Reviewed-by: Andrew Jones <ajones@ventanamicro.com> > > Thanks, > drew
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index ef8311dafb91..4afa2cd01bae 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -233,20 +233,20 @@ enum sbi_pmu_ctr_type { #define SBI_PMU_EVENT_IDX_INVALID 0xFFFFFFFF /* Flags defined for config matching function */ -#define SBI_PMU_CFG_FLAG_SKIP_MATCH (1 << 0) -#define SBI_PMU_CFG_FLAG_CLEAR_VALUE (1 << 1) -#define SBI_PMU_CFG_FLAG_AUTO_START (1 << 2) -#define SBI_PMU_CFG_FLAG_SET_VUINH (1 << 3) -#define SBI_PMU_CFG_FLAG_SET_VSINH (1 << 4) -#define SBI_PMU_CFG_FLAG_SET_UINH (1 << 5) -#define SBI_PMU_CFG_FLAG_SET_SINH (1 << 6) -#define SBI_PMU_CFG_FLAG_SET_MINH (1 << 7) +#define SBI_PMU_CFG_FLAG_SKIP_MATCH BIT(0) +#define SBI_PMU_CFG_FLAG_CLEAR_VALUE BIT(1) +#define SBI_PMU_CFG_FLAG_AUTO_START BIT(2) +#define SBI_PMU_CFG_FLAG_SET_VUINH BIT(3) +#define SBI_PMU_CFG_FLAG_SET_VSINH BIT(4) +#define SBI_PMU_CFG_FLAG_SET_UINH BIT(5) +#define SBI_PMU_CFG_FLAG_SET_SINH BIT(6) +#define SBI_PMU_CFG_FLAG_SET_MINH BIT(7) /* Flags defined for counter start function */ -#define SBI_PMU_START_FLAG_SET_INIT_VALUE (1 << 0) +#define SBI_PMU_START_FLAG_SET_INIT_VALUE BIT(0) /* Flags defined for counter stop function */ -#define SBI_PMU_STOP_FLAG_RESET (1 << 0) +#define SBI_PMU_STOP_FLAG_RESET BIT(0) enum sbi_ext_dbcn_fid { SBI_EXT_DBCN_CONSOLE_WRITE = 0, diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c index babf1b9a4dbe..a83ae82301e3 100644 --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -386,7 +386,7 @@ static int pmu_sbi_ctr_get_idx(struct perf_event *event) cmask = 1; } else if (event->attr.config == PERF_COUNT_HW_INSTRUCTIONS) { cflags |= SBI_PMU_CFG_FLAG_SKIP_MATCH; - cmask = 1UL << (CSR_INSTRET - CSR_CYCLE); + cmask = BIT(CSR_INSTRET - CSR_CYCLE); } }
It is a good practice to use BIT() instead of (1UL << x). Replace the current usages with BIT(). Signed-off-by: Atish Patra <atishp@rivosinc.com> --- arch/riscv/include/asm/sbi.h | 20 ++++++++++---------- drivers/perf/riscv_pmu_sbi.c | 2 +- 2 files changed, 11 insertions(+), 11 deletions(-)